How can I add Keyboard Shortcut to run a script in Google Docs?

Question

For everyday work log, I've enhanced script from this link but it's a tedious task to do using the touchpad. If there's a way I can call the script using the keyboard shortcut. It'd be much faster and less tedious. The script is just an example.

    /**
     * The onOpen function runs automatically when the Google Docs document is
     * opened. Use it to add custom menus to Google Docs that allow the user to run
     * custom scripts. For more information, please consult the following two
     * resources.
     *
     * Extending Google Docs developer guide:
     *     https://developers.google.com/apps-script/guides/docs
     *
     * Document service reference documentation:
     *     https://developers.google.com/apps-script/reference/document/
     */
    function onOpen() {
      // Add a menu with some items, some separators, and a sub-menu.
      DocumentApp.getUi().createMenu('Utilities')
          .addItem('Insert Date', 'insertAtCursor')
          .addToUi();
    }

    /**
     * Inserts the date at the current cursor location in boldface.
     */
    function insertAtCursor() {
      var cursor = DocumentApp.getActiveDocument().getCursor();

      if (cursor) {
        // Attempt to insert text at the cursor position. If insertion returns null,
        // then the cursor's containing element doesn't allow text insertions.
        var date = (new Date).toLocaleDateString('default', { day: 'numeric', month: 'long', year: 'numeric'}); 
        // use your local (browser) date format with month name
        var element = cursor.insertText(date + "\n\nTasks Assigned : \n\nTasks Done : ");
        if (element) {
          element.setBold(true);
        } else {
          DocumentApp.getUi().alert('Cannot insert text at this cursor location.');
        }
      } else {
        DocumentApp.getUi().alert('Cannot find a cursor in the document.');
      }
    }

Thank you for reading.